1.2 Processor Registers (2/4) User-Visible registers How to use: May be referenced(访问/存取) by machine assemble language .Who will use: Available to all programs application programs system programs int fO register intⅰ=0 for(int X=0×<100000×X++) i++;1.2 Processor Registers(2/4) • User-Visible Registers • How to use：May be referenced（访问/存取） by machine/assemble language • Who will use：Available to all programs • application programs • system programs int f() { register int i=0; for(int x=0;x<100000;x++) i++; 9